<template>
  <div :class="[prefixCls, `${prefixCls}--${theme}`]">
    <a-breadcrumb :routes="routes">
      <template #itemRender="{ route, routes: routesMatched, paths }">
        <Icon
          :icon="getIcon(route)"
          v-if="getShowBreadCrumbIcon && getIcon(route)"
        />
        <span v-if="!hasRedirect(routesMatched, route)">
          {{ t(route.name || route.meta.title) }}
        </span>
        <router-link v-else to="" @click="handleClick(route, paths, $event)">
          {{ t(route.name || route.meta.title) }}
        </router-link>
      </template>
    </a-breadcrumb>
  </div>
</template>
<script lang="ts">
import type { RouteLocationMatched } from 'vue-router'
import { useRouter } from 'vue-router'
import type { Menu } from '@/router/types'

import { defineComponent, ref, watchEffect } from 'vue'

import { Breadcrumb } from 'ant-design-vue'
import Icon from '@/components/Icon'

import { useDesign } from '@/hooks/web/useDesign'
import { useRootSetting } from '@/hooks/setting/useRootSetting'
import { useGo } from '@/hooks/web/usePage'
import { useI18n } from '@admin/locale'
import { REDIRECT_NAME } from '@admin/tokens'

import { isString, filterTree } from '@admin/utils'
import { getMenus } from '@/router/menus'

import { getAllParentPath } from '@/router/helper/menuHelper'

export default defineComponent({
  name: 'LayoutBreadcrumb',
  components: { Icon, [Breadcrumb.name]: Breadcrumb },
  props: {
    theme: {
      type: String,
      validator: (v: string) => ['dark', 'light'].includes(v),
    },
  },
  setup() {
    const routes = ref<RouteLocationMatched[]>([])
    const { currentRoute } = useRouter()
    const { prefixCls } = useDesign('layout-breadcrumb')
    const { getShowBreadCrumbIcon } = useRootSetting()
    const go = useGo()

    const { t } = useI18n()
    watchEffect(async () => {
      if (currentRoute.value.name === REDIRECT_NAME) return
      const menus = await getMenus()

      const routeMatched = currentRoute.value.matched
      const cur = routeMatched?.[routeMatched.length - 1]
      let path = currentRoute.value.path

      if (cur && cur?.meta?.currentActiveMenu) {
        path = cur.meta.currentActiveMenu as string
      }

      const parent = getAllParentPath(menus, path)
      const filterMenus = menus.filter((item) => item.path === parent[0])
      const matched = getMatched(filterMenus, parent) as any

      if (!matched || matched.length === 0) return

      const breadcrumbList = filterItem(matched)

      if (currentRoute.value.meta?.currentActiveMenu) {
        breadcrumbList.push({
          ...currentRoute.value,
          name: currentRoute.value.meta?.title || currentRoute.value.name,
        } as unknown as RouteLocationMatched)
      }
      routes.value = breadcrumbList
    })

    function getMatched(menus: Menu[], parent: string[]) {
      const metched: Menu[] = []
      menus.forEach((item) => {
        if (parent.includes(item.path)) {
          metched.push({
            ...item,
            name: item.meta?.title || item.name,
          })
        }
        if (item.children?.length) {
          metched.push(...getMatched(item.children, parent))
        }
      })
      return metched
    }

    function filterItem(list: RouteLocationMatched[]) {
      return filterTree(list, (item) => {
        const { meta, name } = item
        if (!meta) {
          return !!name
        }
        const { title, hideBreadcrumb, hideMenu } = meta
        if (!title || hideBreadcrumb || hideMenu) {
          return false
        }
        return true
      }).filter((item) => !item.meta?.hideBreadcrumb)
    }

    function handleClick(
      route: RouteLocationMatched,
      paths: string[],
      e: Event,
    ) {
      e?.preventDefault()
      const { children, redirect, meta } = route

      if (children?.length && !redirect) {
        e?.stopPropagation()
        return
      }
      if (meta?.carryParam) {
        return
      }

      if (redirect && isString(redirect)) {
        go(redirect)
      } else {
        let goPath = ''
        if (paths.length === 1) {
          goPath = paths[0]
        } else {
          const ps = paths.slice(1)
          const lastPath = ps.pop() || ''
          goPath = `${lastPath}`
        }
        goPath = /^\//.test(goPath) ? goPath : `/${goPath}`
        go(goPath)
      }
    }

    function hasRedirect(
      routes: RouteLocationMatched[],
      route: RouteLocationMatched,
    ) {
      return routes.indexOf(route) !== routes.length - 1
    }

    function getIcon(route) {
      return route.icon || route.meta?.icon
    }

    return {
      routes,
      t,
      prefixCls,
      getIcon,
      getShowBreadCrumbIcon,
      handleClick,
      hasRedirect,
    }
  },
})
</script>
<style lang="less">
@prefix-cls: ~'@{namespace}-layout-breadcrumb';

.@{prefix-cls} {
  display: flex;
  padding: 0 8px;
  align-items: center;

  .ant-breadcrumb-link {
    .anticon {
      margin-right: 4px;
      margin-bottom: 2px;
    }
  }

  &--light {
    .ant-breadcrumb-link {
      color: @breadcrumb-item-normal-color;

      a {
        color: rgb(0 0 0 / 65%);

        &:hover {
          color: @primary-color;
        }
      }
    }

    .ant-breadcrumb-separator {
      color: @breadcrumb-item-normal-color;
    }
  }

  &--dark {
    .ant-breadcrumb-link {
      color: rgb(255 255 255 / 60%);

      a {
        color: rgb(255 255 255 / 80%);

        &:hover {
          color: @white;
        }
      }
    }

    .ant-breadcrumb-separator,
    .anticon {
      color: rgb(255 255 255 / 80%);
    }
  }
}
</style>
